CN221390815U - Ratchet wrench - Google Patents

Abstract

The utility model discloses a ratchet wrench, which comprises a wrench main body, wherein a rotatable ratchet ring is arranged at the front part of the wrench main body, a rotatable left pawl and a rotatable right pawl are symmetrically arranged at the rear part of the wrench main body, a first left tooth part and a first right tooth part are arranged on the matching surface of the left pawl and the ratchet ring, and a second left tooth part and a second right tooth part are arranged on the matching surface of the right pawl and the ratchet ring; when the left pawl and the right pawl swing to the ratchet ring to the two sides, the two left teeth parts or the two right teeth parts are meshed with the ratchet ring simultaneously to carry out rotation restriction in a certain direction. According to the utility model, two meshing teeth are arranged on the two pawls, so that the meshing state with the ratchet ring is switched when the two pawls swing, the ratchet wrench function is realized, the meshing strength is improved by symmetrical two meshing, the swinging range of pawl switching is reduced, the operation efficiency is improved, and the manufacturing cost and difficulty are reduced as a whole.

Description

Ratchet wrench

Technical Field

The utility model relates to the field of hardware tools, in particular to a ratchet wrench.

Background

In the prior art, a ratchet wrench is provided with a pawl, the pawl is driven to rotate to enable one side to be meshed with a ratchet ring, the ratchet ring is meshed to be driven to rotate together with the wrench, after a certain angle of manual operation and rotation, the meshing state can be released, and the wrench continues to rotate after being meshed again, so that the function of screwing a fastener of the wrench is achieved; and the tooth structures at the two sides of the pawl are matched with the ratchet wheel ring to control the positive rotation or the negative rotation of the pawl. In order to ensure the stability of the engagement of the pawl with the ratchet ring, the pawl and ratchet ring require sufficient teeth and angles to increase the engagement strength, which requires greater complexity in the design and manufacture of the pawl and ratchet ring, thereby increasing the cost and difficulty of manufacture.

Disclosure of utility model

Aiming at the defects existing in the prior art, the utility model aims to provide the ratchet wrench, which is characterized in that two meshing teeth are arranged on two pawls, so that the meshing state with a ratchet ring is switched when the two pawls swing, the function of the ratchet wrench is realized, the meshing strength is ensured, and the overall manufacturing cost and difficulty are reduced.

The utility model provides the following technical scheme: the ratchet wrench comprises a wrench main body, wherein a rotatable ratchet ring is arranged at the front part of the wrench main body, a rotatable left pawl and a rotatable right pawl are symmetrically arranged at the rear part of the wrench main body, a first left tooth part and a first right tooth part are arranged on the matching surface of the left pawl and the ratchet ring, and a second left tooth part and a second right tooth part are arranged on the matching surface of the right pawl and the ratchet ring; when the left pawl and the right pawl swing to one side to the ratchet ring, the first left tooth part and the second left tooth part are simultaneously meshed with the ratchet ring to carry out rotation restriction in one direction; when the left pawl and the right pawl swing to the other side to the ratchet ring, the first right tooth part and the second right tooth part are simultaneously meshed with the ratchet ring to carry out rotation restriction in the other direction.

As an improvement, the rear parts of the left pawl and the right pawl are provided with sliding bars which can slide on the wrench main body, and the left pawl and the right pawl are synchronously driven to swing when the sliding bars are driven to slide left and right.

As an improvement, the middle part of the slide bar is connected with a handle, the handle is rotatably arranged on the wrench body, and the slide bar is driven to slide in a linkage manner when the handle is driven to swing left or right.

As an improvement, one end of the handle is provided with a swing arm, the middle part of the outer side of the slide bar is provided with a first groove for the swing arm to be inserted and accommodated, and the swing arm drives the slide bar to slide when swinging left and right.

As an improvement, two elastic supporting blocks are arranged on the sliding rod and respectively support against the outer sides of the left pawl and the right pawl, and when the sliding rod slides left and right, the elastic supporting blocks support against the left pawl and the right pawl to swing.

As an improvement, the elastic abutting block comprises an abutting head and a spring, the abutting head and the spring are jointly accommodated in a second groove formed in the sliding rod, and the spring enables the abutting head to extend out of the second groove and abut against the left pawl or the right pawl by means of elasticity.

As an improvement, the ratchet ring is provided with 90 teeth on the circumference.

The utility model has the beneficial effects that: through set up two meshing teeth on two pawls, switch the meshing state with the ratchet ring when two pawls swing, when realizing ratchet spanner function, symmetrical two meshing improves the meshing intensity, and the swing scope that the pawl was switched diminishes, improves operating efficiency, reduces manufacturing cost and degree of difficulty on the whole.

Drawings

Fig. 1 is a schematic view of a partial cross-sectional structure of the present utility model.

Fig. 2 is a schematic view of a partial perspective structure of the present utility model.

Fig. 3 is a schematic perspective view of the present utility model.

Detailed Description

Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1, 2 and 3, a ratchet wrench according to an embodiment of the present utility model is shown. The embodiment comprises a wrench body 1, wherein a rotatable ratchet ring 2 is arranged at the front part of the wrench body 1, a rotatable left pawl 3 and a rotatable right pawl 4 are symmetrically arranged at the rear part of the wrench body 1, a first left tooth part 31 and a first right tooth part 32 are arranged on the matching surface of the left pawl 3 and the ratchet ring 2, and a second left tooth part 41 and a second right tooth part 42 are arranged on the matching surface of the right pawl 4 and the ratchet ring 2; when the left pawl 3 and the right pawl 4 swing to one side to the ratchet ring 2, the first left tooth part 31 and the second left tooth part 41 are simultaneously meshed with the ratchet ring 2 to perform rotation restriction in one direction; when the left pawl 3 and the right pawl 4 swing to the other side to the ratchet ring 2, rotation restriction in the other direction is performed by the first right tooth portion 32 and the second right tooth portion 42 simultaneously engaging with the ratchet ring 2.

When the utility model is used, the tool head with the required function is arranged on the ratchet ring 2, so that the tool head can be rotated for use. As an optimization, by providing a symmetrical left pawl 3 and right pawl 4, taking the drawing as an example, when the left pawl 3 and right pawl 4 are driven to swing clockwise, the first left tooth portion 31 and the second left tooth portion 41 are made to engage the ratchet ring 2 from two places; when the left pawl 3 and the right pawl 4 are driven to swing anticlockwise, the first right tooth part 32 and the second right tooth part 42 are meshed with the ratchet ring 2, and the meshing state of the pawl and the ratchet ring can be controlled according to the condition of a fastener to be operated by the ratchet wrench, so that the purpose of forward rotation or reverse rotation is achieved.

As an optimization, the ratchet ring 2 is provided with 90 teeth on the circumference. The circumference is 360 degrees, each tooth of 90 teeth is 4 degrees, and the relative angles of the matching angles of the left pawl 3 and the right pawl 4 are different by 2 degrees and are half of one tooth angle; when the first left tooth portion 31 of the left pawl 3 is engaged with the ratchet ring 2, the second left tooth portion 41 of the right pawl 4 interferes with the ratchet ring 2, thereby forming a position restriction state of both sides; at the time of 2 degrees of rotation, the second right tooth portion 42 of the right pawl 4 is engaged with the ratchet ring 2, and the first right tooth portion 32 of the left pawl 3 interferes with the ratchet ring 2, thereby forming a two-sided position restriction state.

As an improved specific embodiment, the rear parts of the left pawl 3 and the right pawl 4 are provided with slide bars 5, the slide bars 5 are slidably arranged on the wrench body 1, and the left pawl 3 and the right pawl 4 are synchronously driven to swing when the slide bars 5 are driven to slide left and right.

As shown in fig. 1, a sliding groove is formed in the wrench body 1, the sliding rod 5 slides in the sliding groove, and when the sliding rod 5 moves leftwards, the first left tooth portion 31 and the second left tooth portion 41 are in contact with the ratchet ring 2; when the slide bar 5 moves rightward, the first right tooth 32 and the second right tooth 42 come into contact with the ratchet ring 2; thereby realizing the reversing function.

As an improved specific embodiment, the middle part of the slide bar 5 is connected with a handle 6, the handle 6 is rotatably arranged on the wrench body 1, and the slide bar 5 is driven to slide in a linkage manner when the handle 6 is driven to swing left or right.

As shown in fig. 1, 2 and 3, the handle 6 extends out of the wrench body 1, so that a user can conveniently drive and slide the slide bar 5, and further adjust the left pawl 3 and the right pawl 4.

As an improved specific embodiment, one end of the handle 6 is provided with a swing arm 61, the middle of the outer side of the slide bar 5 is provided with a first groove 51 for the swing arm 61 to be inserted and accommodated, and the swing arm 61 drives the slide bar 5 to slide when swinging leftwards and rightwards.

As shown in fig. 1, the swing of the swing arm 61 can be converted into a left-right pushing of the first groove 51, so as to realize the translation of the sliding rod 5 along the sliding groove, and finally realize the stable and orderly driving swing of the left pawl 3 and the right pawl 4.

As an improved specific embodiment, two elastic supporting blocks 7 are arranged on the sliding rod 5, the two elastic supporting blocks 7 respectively abut against the outer sides of the left pawl 3 and the right pawl 4, and when the sliding rod 5 slides left and right, the elastic supporting blocks 7 abut against the left pawl 3 and the right pawl 4 to swing.

As shown in fig. 1, the elastic supporting block 7 applies elastic supporting force to the left pawl 3 and the right pawl 4, so that the left pawl 3 and the right pawl 4 can be rapidly driven to swing towards the ratchet ring 2, when the sliding rod 5 slides to enable the elastic supporting block 7 to pass through the rotating shaft positions of the left pawl 3 and the right pawl 4, the left pawl 3 and the right pawl 4 can be rapidly pushed by virtue of elasticity to swing towards the ratchet ring 2 to complete meshing, the supporting force has certain elasticity, and damage risks caused by hard locking between structures can be reduced.

As a modified embodiment, the elastic abutment 7 includes an abutment 71 and a spring 72, where the abutment 71 and the spring 72 are jointly accommodated in the second recess 52 provided on the slide bar 5, and the spring 72 elastically causes the abutment 71 to extend out of the second recess 52 and abut against the left pawl 3 or the right pawl 4.

As shown in fig. 1, the abutment 71 extends out of the second groove 52, interferes with the left pawl 3 and the right pawl 4 to form structural fit, further functions, the spring 72 is accommodated in the second groove 52 to form good limit, and the engagement state of the abutment 71 with the left pawl 3 and the right pawl 4 is maintained by compression or elastic release.

The above is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (7)

1. Ratchet wrench, comprising a wrench body (1), the front part of the wrench body (1) being provided with a rotatable ratchet ring (2), characterized in that: the rear part of the wrench body (1) is symmetrically provided with a rotatable left pawl (3) and a rotatable right pawl (4), the matching surface of the left pawl (3) and the ratchet ring (2) is provided with a first left tooth part (31) and a first right tooth part (32), and the matching surface of the right pawl (4) and the ratchet ring (2) is provided with a second left tooth part (41) and a second right tooth part (42); when the left pawl (3) and the right pawl (4) swing to one side to the ratchet ring (2), the first left tooth part (31) and the second left tooth part (41) are simultaneously meshed with the ratchet ring (2) to carry out rotation restriction in one direction; when the left pawl (3) and the right pawl (4) swing to the ratchet ring (2) to the other side, the first right tooth part (32) and the second right tooth part (42) are simultaneously meshed with the ratchet ring (2) to carry out rotation restriction in the other direction.

2. The ratchet wrench of claim 1, wherein: the rear parts of the left pawl (3) and the right pawl (4) are provided with sliding rods (5), the sliding rods (5) are slidably arranged on the wrench main body (1), and the left pawl (3) and the right pawl (4) are synchronously driven to swing when the sliding rods (5) are driven to slide left and right.

3. The ratchet wrench of claim 2, wherein: the middle part of the slide bar (5) is connected with a handle (6), the handle (6) is rotatably arranged on the wrench main body (1), and the slide bar (5) is driven to slide in a linkage manner when the handle (6) is driven to swing left or right.

4. A ratchet wrench as claimed in claim 3, wherein: one end of the handle (6) is provided with a swing arm (61), the middle part of the outer side of the slide bar (5) is provided with a first groove (51) for the swing arm (61) to be inserted and accommodated, and the swing arm (61) drives the slide bar (5) to slide when swinging leftwards and rightwards.

5. A ratchet wrench as claimed in claim 2, 3 or 4, wherein: two elastic supporting blocks (7) are arranged on the sliding rod (5), the two elastic supporting blocks (7) respectively support against the outer sides of the left pawl (3) and the right pawl (4), and when the sliding rod (5) slides left and right, the elastic supporting blocks (7) support against the left pawl (3) and the right pawl (4) to swing.

6. The ratchet wrench of claim 5, wherein: the elastic abutting block (7) comprises an abutting head (71) and a spring (72), the abutting head (71) and the spring (72) are jointly accommodated in a second groove (52) formed in the sliding rod (5), and the spring (72) enables the abutting head (71) to extend out of the second groove (52) and abut against the left pawl (3) or the right pawl (4) by means of elasticity.

7. The ratchet wrench of any one of claims 1-4, wherein: the ratchet ring (2) is provided with 90 teeth on the circumference.